The Fujita scale is a scale used for rating tornado strength, based on the damage tornadoes cause on human-built buildings and vegetation. The official Fujita scale category is determined by meteorologists (and engineers) after a ground and/or aerial damage inspection; also including analysis of available sources such as eyewitness accounts and damage images and/or videos. It was replaced with the Enhanced Fujita scale in the United States in February 2007 and in Canada in April 2013.
| Scale | Wind speed* | Relative frequency | Common Damage Path Width (meters) | Example of Damage |
| mph | km/h |
| F0 | 40–72 | 64–116 | 38.9% | 10 - 50 | Light damage |
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